diff -pruN 1.5.1-1/debian/changelog 1.5.1-1ubuntu1/debian/changelog
--- 1.5.1-1/debian/changelog	2025-02-02 05:04:36.000000000 +0000
+++ 1.5.1-1ubuntu1/debian/changelog	2025-02-11 05:22:42.000000000 +0000
@@ -1,3 +1,11 @@
+protobuf-c (1.5.1-1ubuntu1) plucky; urgency=medium
+
+  * Merge from Debian Unstable. Remaining changes:
+    + d/tests/{control,build-test}: Run self-test and 'build-test' autopkgtest
+    + d/watch: Add a watch file
+
+ -- Simon Quigley <tsimonq2@ubuntu.com>  Mon, 10 Feb 2025 23:22:42 -0600
+
 protobuf-c (1.5.1-1) unstable; urgency=medium
 
   * New upstream version 1.5.1 (Closes: #1077250)
@@ -11,12 +19,63 @@ protobuf-c (1.5.1-1) unstable; urgency=m
 
  -- Robert Edmonds <edmonds@debian.org>  Sun, 02 Feb 2025 00:04:36 -0500
 
+protobuf-c (1.4.1-1ubuntu4) noble; urgency=medium
+
+  * No-change rebuild for CVE-2024-3094
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Sun, 31 Mar 2024 08:16:39 +0000
+
+protobuf-c (1.4.1-1ubuntu3) noble; urgency=high
+
+  * No change rebuild against libprotobuf32t64.
+
+ -- Julian Andres Klode <juliank@ubuntu.com>  Fri, 22 Mar 2024 14:20:26 +0100
+
+protobuf-c (1.4.1-1ubuntu2) lunar; urgency=medium
+
+  * Rebuild against new libprotobuf32.
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Wed, 04 Jan 2023 17:47:24 +0100
+
+protobuf-c (1.4.1-1ubuntu1) kinetic; urgency=medium
+
+  * Merged from Debian unstable.  Remaining changes: (LP 1956617)
+    + d/tests/{control,build-test}: Run self-test and 'build-test' autopkgtest
+    + d/watch: Adding watch file
+
+ -- Lukas Märdian <slyon@ubuntu.com>  Tue, 12 Jul 2022 17:14:35 +0200
+
 protobuf-c (1.4.1-1) unstable; urgency=medium
 
   * New upstream version 1.4.1
 
  -- Robert Edmonds <edmonds@debian.org>  Sun, 10 Jul 2022 21:55:24 -0400
 
+protobuf-c (1.3.3-1ubuntu2) jammy; urgency=medium
+
+  * Add another 'build-test' autopkgtest to verify usability of the actually
+    installed libprotobuf-c library
+
+ -- Lukas Märdian <slyon@ubuntu.com>  Fri, 04 Feb 2022 15:28:50 +0100
+
+protobuf-c (1.3.3-1ubuntu1) jammy; urgency=medium
+
+  * Add d/watch and run the self tests as autopkgtest
+
+ -- Lukas Märdian <slyon@ubuntu.com>  Fri, 04 Feb 2022 12:33:06 +0100
+
+protobuf-c (1.3.3-1build2) groovy; urgency=medium
+
+  * Rebuild against new libprotobuf23.
+
+ -- Gianfranco Costamagna <locutusofborg@debian.org>  Sun, 26 Jul 2020 10:21:46 +0200
+
+protobuf-c (1.3.3-1build1) groovy; urgency=medium
+
+  * No-change rebuild against libprotoc22
+
+ -- Steve Langasek <steve.langasek@ubuntu.com>  Mon, 04 May 2020 21:26:15 +0000
+
 protobuf-c (1.3.3-1) unstable; urgency=medium
 
   * New upstream version 1.3.3
@@ -215,3 +274,4 @@ protobuf-c (0.10-1) unstable; urgency=lo
   * Initial release; closes: #528147.
 
  -- Robert S. Edmonds <edmonds@debian.org>  Sun, 10 May 2009 23:34:05 -0400
+
diff -pruN 1.5.1-1/debian/control 1.5.1-1ubuntu1/debian/control
--- 1.5.1-1/debian/control	2025-02-02 05:04:36.000000000 +0000
+++ 1.5.1-1ubuntu1/debian/control	2025-02-02 09:19:35.000000000 +0000
@@ -1,7 +1,8 @@
 Source: protobuf-c
 Section: devel
 Priority: optional
-Maintainer: Robert Edmonds <edmonds@debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Robert Edmonds <edmonds@debian.org>
 Build-Depends:
  debhelper-compat (= 13),
  libprotobuf-dev,
diff -pruN 1.5.1-1/debian/tests/build-test 1.5.1-1ubuntu1/debian/tests/build-test
--- 1.5.1-1/debian/tests/build-test	1970-01-01 00:00:00.000000000 +0000
+++ 1.5.1-1ubuntu1/debian/tests/build-test	2022-07-12 15:14:03.000000000 +0000
@@ -0,0 +1,29 @@
+#!/bin/sh
+set -eu
+
+if [ -n "${DEB_HOST_GNU_TYPE:-}" ]; then
+    CROSS_COMPILE="$DEB_HOST_GNU_TYPE-"
+else
+    CROSS_COMPILE=
+fi
+
+cd "$AUTOPKGTEST_TMP"
+
+cat <<EOF > libtest.c
+#include <stdio.h>
+#include <protobuf-c/protobuf-c.h>
+
+int
+main (int    argc,
+      char **argv)
+{
+        const char* version_str = protobuf_c_version();
+        printf("protobuf-c version: %s\n", version_str);
+}
+EOF
+
+${CROSS_COMPILE}gcc -o libtest libtest.c $(${CROSS_COMPILE}pkg-config --cflags --libs libprotobuf-c)
+echo "build ok"
+[ -x libtest ]
+./libtest
+echo "starts ok"
diff -pruN 1.5.1-1/debian/tests/control 1.5.1-1ubuntu1/debian/tests/control
--- 1.5.1-1/debian/tests/control	1970-01-01 00:00:00.000000000 +0000
+++ 1.5.1-1ubuntu1/debian/tests/control	2022-07-12 15:14:03.000000000 +0000
@@ -0,0 +1,6 @@
+Tests: build-test
+Depends: libprotobuf-c-dev, build-essential, pkg-config
+
+Test-Command: dh_auto_configure; dh_auto_build; dh_auto_test
+Depends: @builddeps@
+Restrictions: allow-stderr
diff -pruN 1.5.1-1/debian/watch 1.5.1-1ubuntu1/debian/watch
--- 1.5.1-1/debian/watch	1970-01-01 00:00:00.000000000 +0000
+++ 1.5.1-1ubuntu1/debian/watch	2022-07-12 15:14:03.000000000 +0000
@@ -0,0 +1,3 @@
+version=4
+opts=filenamemangle=s/.+\/v?(\d\S+)\.tar\.gz/<project>-$1\.tar\.gz/ \
+  https://github.com/protobuf-c/protobuf-c/tags .*/v?(\d\S+)\.tar\.gz